The Productivity Portfolio blog covers how send your Outlook calendar in an email in a format that anyone—even non-Outlook users—can open. Everyone's got wacky work and life schedules around the holidays, so you may want to dash off your calendar to a co-worker or client before you go. In short, Outlook attaches an .ISC file to the outgoing email, which the recipient can open in iCal, Google Calendar, or any app that supports iCalendar files. Handy.